:root{
  --bg:#f6f8fb;
  --surface:#ffffff;
  --surface-2:#eef3f8;
  --text:#152033;
  --muted:#637083;
  --line:#dfe6ee;
  --accent:#2f6fed;
  --accent-dark:#2458bd;
  --success:#0f8a5f;
  --danger:#b42318;
  --shadow:0 18px 55px rgba(31,49,78,.10);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}
.narrow{width:min(840px,100%)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:20;background:rgba(246,248,251,.9);backdrop-filter:blur(14px);border-bottom:1px solid rgba(223,230,238,.82)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.03em}
.brand-mark{display:grid;place-items:center;min-width:44px;height:38px;padding:0 8px;border-radius:12px;background:var(--accent);color:#fff;font-size:15px;letter-spacing:.02em}
.brand-name{font-size:20px}
.language-select{min-width:150px;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 38px 10px 12px;outline:none}
.language-select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,111,237,.12)}
.hero{padding:68px 0 42px;background:radial-gradient(circle at 85% 10%,rgba(47,111,237,.12),transparent 34%),linear-gradient(180deg,#fbfdff 0%,var(--bg) 100%)}
.hero-inner{display:grid;grid-template-columns:minmax(0,.82fr) minmax(560px,1.18fr);align-items:center;gap:54px}
.hero-copy{padding-bottom:42px}
.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-weight:800;font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:clamp(38px,5vw,66px);line-height:1.03;letter-spacing:-.055em;margin:0 0 20px;max-width:760px}
.hero-copy p{font-size:clamp(18px,2.1vw,23px);color:var(--muted);max-width:610px;margin:0}
.converter-card{background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:6px;background:var(--surface-2);border-radius:16px;margin-bottom:24px}
.mode-tab{border:0;background:transparent;color:var(--muted);border-radius:12px;padding:11px 14px;font-weight:750;transition:.2s ease}
.mode-tab.active{background:#fff;color:var(--text);box-shadow:0 4px 16px rgba(31,49,78,.08)}
.converter-panel label{display:block;font-size:14px;font-weight:760;margin-bottom:8px}
.input-shell{position:relative}
.input-shell input,textarea,select{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);outline:none;transition:.2s ease}
.input-shell input{height:58px;padding:0 52px 0 16px;font-size:20px;font-weight:650;letter-spacing:.01em}
textarea{resize:vertical;min-height:112px;padding:14px 16px}
.controls-grid select{height:48px;padding:0 12px}
.input-shell input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,111,237,.12)}
.icon-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:10px;background:transparent;color:#8792a2;font-size:26px;line-height:1}
.icon-btn:hover{background:var(--surface-2);color:var(--text)}
.controls-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0}
.primary-btn{width:100%;border:0;border-radius:14px;background:var(--accent);color:#fff;font-weight:800;padding:14px 18px;box-shadow:0 8px 18px rgba(47,111,237,.22);transition:.18s ease}
.primary-btn:hover{background:var(--accent-dark);transform:translateY(-1px)}
.primary-btn:active{transform:translateY(0)}
.examples-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:16px;color:var(--muted);font-size:13px}
.examples-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;color:var(--text)}
.examples-row button:hover{border-color:#b9c8da;background:#f8fbff}
.helper-text{margin:10px 0 16px;color:var(--muted);font-size:13px}
.result-box{margin-top:20px;border:1px solid #cfe0ff;background:#f6f9ff;border-radius:18px;padding:18px}
.result-head{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--muted);font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.copy-btn{border:0;background:transparent;color:var(--accent);font-weight:800;padding:4px 0;text-transform:none;letter-spacing:0}
.result-text{font-size:19px;font-weight:720;line-height:1.5;word-break:break-word}
.result-text.error{color:var(--danger);font-size:15px;font-weight:650}
.content-section{padding:76px 0;background:#fff}
.content-section.muted-section{background:var(--bg);border-top:1px solid rgba(223,230,238,.7);border-bottom:1px solid rgba(223,230,238,.7)}
.content-section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.15;letter-spacing:-.035em;margin:0 0 18px}
.content-section p{color:var(--muted);font-size:17px;margin:0 0 14px}
.content-grid{display:grid;grid-template-columns:1.5fr .7fr;gap:48px;align-items:center}
.feature-card{background:linear-gradient(145deg,#f7faff,#eef4ff);border:1px solid #dbe7fb;border-radius:22px;padding:26px}
.feature-card .feature-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:17px;background:var(--accent);color:#fff;font-weight:900;letter-spacing:-.05em;margin-bottom:20px}
.feature-card strong{display:block;font-size:18px;margin-bottom:8px}
.feature-card p{font-size:15px;margin:0}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.step-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}
.step-card span{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:#eaf1ff;color:var(--accent);font-weight:850;margin-bottom:18px}
.step-card p{margin:0;font-size:16px}
.example-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;margin-top:24px}
.example-table{border-collapse:collapse;width:100%;min-width:560px;background:#fff}
.example-table th,.example-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line)}
.example-table th{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:#fbfcfe}
.example-table tr:last-child td{border-bottom:0}
.example-table td:first-child{font-weight:800;width:180px}
.split-copy{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.faq-list{display:grid;gap:12px;margin-top:28px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 18px}
.faq-item summary{cursor:pointer;list-style:none;font-weight:800;padding:18px 28px 18px 0;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:'+';position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:24px;color:var(--muted);font-weight:500}
.faq-item[open] summary:after{content:'−'}
.faq-item p{padding:0 0 18px;margin:0;font-size:16px}
.site-footer{background:#111827;color:#e5e7eb;padding:46px 0 24px}
.footer-inner{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}
.footer-brand{font-size:20px;font-weight:850;margin-bottom:6px}
.site-footer p{color:#9ca3af;margin:0}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;color:#cbd5e1}
.footer-links a:hover{color:#fff}
.copyright{border-top:1px solid #2a3443;margin-top:32px;padding-top:20px;color:#7f8a99;font-size:13px}
.privacy-page{min-height:65vh;padding:70px 0;background:#fff}
.privacy-page article{max-width:820px}
.privacy-page h1{font-size:44px;letter-spacing:-.04em;margin:0 0 24px}
.privacy-page h2{margin-top:34px}
.privacy-page p{color:var(--muted)}
@media (max-width:960px){
  .hero{padding-top:48px}
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero-copy{padding-bottom:0;text-align:center}
  .hero-copy p{margin-inline:auto}
  .converter-card{max-width:720px;width:100%;margin-inline:auto}
  .content-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:720px){
  .container{width:min(100% - 22px,1120px)}
  .header-inner{min-height:64px}
  .brand-name{font-size:18px}
  .brand-mark{min-width:40px;height:36px}
  .language-select{min-width:120px;max-width:148px;padding-left:10px}
  .hero{padding:34px 0 28px}
  .hero h1{font-size:38px}
  .hero-copy p{font-size:17px}
  .converter-card{padding:16px;border-radius:20px}
  .mode-tab{padding:10px 8px;font-size:14px}
  .controls-grid{grid-template-columns:1fr}
  .input-shell input{font-size:18px}
  .result-text{font-size:17px}
  .content-section{padding:52px 0}
  .steps-grid{grid-template-columns:1fr}
  .split-copy{grid-template-columns:1fr;gap:30px}
  .footer-inner{flex-direction:column}
  .examples-row span{width:100%}
}